John:
The dye is attacking the plastic because the solvent system is
incompatible with the plastic.
Toss the dye, and use plain old enamel. You should have no
problems.
Vance
-----Original Message-----
From: owner-6pack@Autox.Team.Net [mailto:owner-6pack@Autox.Team.Net] On
Behalf Of John & Allison Cyganowski
Sent: February 10, 2007 7:58 AM
To: 6pack
Subject: Center Cap Painting
Hi All-
I ran into something odd recently. I was try to restore my black
plastic
centercaps for my wheels. I filled a few spots with JB Weld and then
went
to spray on black plastic dye.
Well initially they looked great but then as they dried I could see all
of
these straitions "string like" marking in the surface. I tried
stripping
the finish, but these marks went into the plastic. Even sanding did not
really get rid of them completely. I noticed this again when I went to
the
British Invasion this fall. Some of the refinished center caps had this
effect.
a.) Does anybody know what is happening here?
b.) Does anyone have a technique for refinishing the center caps that
does
not produce theis effect?
The only thing I can think of is that the centercaps appear to be hot
stamped out of plastic sheet instead of injection molded. Maybe they
are
under stress and the cracks appeared when the plastic surface stress
relieved possibly from the solvent in the dye? Does this make sense?
John Cyg
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